block/xen-blkback/xenbus.c

78 	int err;
96 	err = blkback_name(blkif, name);
97 	if (err) {
98 		xenbus_dev_error(blkif->be->dev, err, "get blkback dev name");
102 	err = sync_blockdev(file_bdev(blkif->vbd.bdev_file));
103 	if (err) {
104 		xenbus_dev_error(blkif->be->dev, err, "block flush");
113 			err = PTR_ERR(ring->xenblkd);
115 			xenbus_dev_fatal(blkif->be->dev, err,
195 	int err;
205 	err = xenbus_map_ring_valloc(blkif->be->dev, gref, nr_grefs,
207 	if (err < 0)
208 		return err;
249 	err = -EIO;
253 	err = bind_interdomain_evtchn_to_irqhandler_lateeoi(blkif->be->dev,
255 	if (err < 0)
257 	ring->irq = err;
264 	return err;
556 	int err;
558 	err = xenbus_printf(xbt, dev->nodename, "feature-flush-cache",
560 	if (err)
561 		dev_warn(&dev->dev, "writing feature-flush-cache (%d)", err);
563 	return err;
570 	int err;
578 		err = xenbus_printf(xbt, dev->nodename,
581 		if (err) {
582 			dev_warn(&dev->dev, "writing discard-granularity (%d)", err);
585 		err = xenbus_printf(xbt, dev->nodename,
588 		if (err) {
589 			dev_warn(&dev->dev, "writing discard-alignment (%d)", err);
594 		err = xenbus_printf(xbt, dev->nodename,
597 		if (err) {
598 			dev_warn(&dev->dev, "writing discard-secure (%d)", err);
602 	err = xenbus_printf(xbt, dev->nodename, "feature-discard",
604 	if (err)
605 		dev_warn(&dev->dev, "writing feature-discard (%d)", err);
612 	int err;
614 	err = xenbus_printf(xbt, dev->nodename, "feature-barrier",
616 	if (err)
617 		dev_warn(&dev->dev, "writing feature-barrier (%d)", err);
619 	return err;
630 	int err;
647 		err = PTR_ERR(be->blkif);
649 		xenbus_dev_fatal(dev, err, "creating block interface");
653 	err = xenbus_printf(XBT_NIL, dev->nodename,
656 	if (err)
659 			 dev->nodename, err);
662 	err = xenbus_printf(XBT_NIL, dev->nodename,
664 	if (err)
670 	err = xenbus_watch_pathfmt(dev, &be->backend_watch, NULL,
673 	if (err)
676 	err = xenbus_printf(XBT_NIL, dev->nodename, "max-ring-page-order", "%u",
678 	if (err)
681 	err = xenbus_switch_state(dev, XenbusStateInitWait);
682 	if (err)
690 	return err;
701 	int err;
713 	err = xenbus_scanf(XBT_NIL, dev->nodename, "physical-device", "%x:%x",
715 	if (XENBUS_EXIST_ERR(err)) {
723 	if (err != 2) {
724 		xenbus_dev_fatal(dev, err, "reading physical-device");
737 		err = PTR_ERR(be->mode);
739 		xenbus_dev_fatal(dev, err, "reading mode");
750 	err = kstrtoul(strrchr(dev->otherend, '/') + 1, 0, &handle);
751 	if (err) {
760 	err = xen_vbd_create(be->blkif, handle, major, minor,
763 	if (err)
764 		xenbus_dev_fatal(dev, err, "creating vbd structure");
766 		err = xenvbd_sysfs_addif(dev);
767 		if (err) {
769 			xenbus_dev_fatal(dev, err, "creating sysfs entries");
773 	if (err) {
791 	int err;
817 		err = xen_blkif_disconnect(be->blkif);
818 		if (err) {
819 			xenbus_dev_fatal(dev, err, "pending I/O");
823 		err = connect_ring(be);
824 		if (err) {
887 	int err;
894 	err = xenbus_transaction_start(&xbt);
895 	if (err) {
896 		xenbus_dev_fatal(dev, err, "starting transaction");
907 	err = xenbus_printf(xbt, dev->nodename, "feature-persistent", "%u",
909 	if (err) {
910 		xenbus_dev_fatal(dev, err, "writing %s/feature-persistent",
915 	err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu",
917 	if (err) {
918 		xenbus_dev_fatal(dev, err, "writing %s/sectors",
924 	err = xenbus_printf(xbt, dev->nodename, "info", "%u",
927 	if (err) {
928 		xenbus_dev_fatal(dev, err, "writing %s/info",
932 	err = xenbus_printf(xbt, dev->nodename, "sector-size", "%lu",
935 	if (err) {
936 		xenbus_dev_fatal(dev, err, "writing %s/sector-size",
940 	err = xenbus_printf(xbt, dev->nodename, "physical-sector-size", "%u",
943 	if (err)
944 		xenbus_dev_error(dev, err, "writing %s/physical-sector-size",
947 	err = xenbus_transaction_end(xbt, 0);
948 	if (err == -EAGAIN)
950 	if (err)
951 		xenbus_dev_fatal(dev, err, "ending transaction");
953 	err = xenbus_switch_state(dev, XenbusStateConnected);
954 	if (err)
955 		xenbus_dev_fatal(dev, err, "%s: switching to Connected state",
970 	int err, i, j;
975 	err = xenbus_scanf(XBT_NIL, dir, "event-channel", "%u",
977 	if (err != 1) {
978 		err = -EINVAL;
979 		xenbus_dev_fatal(dev, err, "reading %s/event-channel", dir);
980 		return err;
1000 		err = xenbus_scanf(XBT_NIL, dir, ring_ref_name,
1003 		if (err != 1) {
1004 			err = -EINVAL;
1005 			xenbus_dev_fatal(dev, err, "reading %s/%s",
1007 			return err;
1011 	err = -ENOMEM;
1031 	err = xen_blkif_map(ring, ring_ref, nr_grefs, evtchn);
1032 	if (err) {
1033 		xenbus_dev_fatal(dev, err, "mapping ring-ref port %u", evtchn);
1054 	return err;
1062 	int err, i;
1072 	err = xenbus_scanf(XBT_NIL, dev->otherend, "protocol",
1074 	if (err <= 0)
1083 		xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);
1103 		xenbus_dev_fatal(dev, err,
1116 	err = xenbus_scanf(XBT_NIL, dev->otherend, "ring-page-order", "%u",
1118 	if (err != 1) {
1125 		err = -EINVAL;
1126 		xenbus_dev_fatal(dev, err,
1130 		return err;
1146 			err = read_per_ring_refs(&blkif->rings[i], xspath);
1147 			if (err) {
1149 				return err;